I just picked up a 2000 Nissan 9.8hp 2 stroke motor. The motor starts and runs good. Has a steady flow of water also. My problems are...
1. The motor seems to be very slow. While in nuetral it seems to rev up nice. Also in reverse. However, when I put the motor into foward (in the water) and hold it at wot it moves very slow and doesnt seem to rev up. Thought it was the prop (maybe spun) but that doesnt make sense. Motor would still rev but boat wouldnt move. Cant be linkage because it would affect the nuetral and reverse options also right? Could fuel mixture be an issue? (anyone know proper mixture?). Am I right to assume the carb cant be the issue? If it were carb related wouldnt it prevent wot in nuetral as well as foward? Like I said it nuetral it revs up and screams, reverse revs up nice and moves just as fast as wot in foward. Foward sounds like it doesnt rev up more than half way. Does foward put more load on the carb than reverse?
2. Once the motor is shut off, regardless of how long its been run, it is still difficult to start back up. I believe this is a carb issue or maybe a poor mixture?
Just for the record I also have a 97 Merc 8hp that Im using on the same boat as comparison. This Merc is easily twice as fast as the nissan and has a much better power band. I need to know if this is normal. Should the merc 8hp be this much better than the nissan 9.8hp? Both are 2 strokes by the way.
I know side by side the merc is considerably larger motor than the nissan. Any input on comparison is appreciated. I was going to replace my merc with the nissan but it's not looking like a wise decision.
1. The motor seems to be very slow. While in nuetral it seems to rev up nice. Also in reverse. However, when I put the motor into foward (in the water) and hold it at wot it moves very slow and doesnt seem to rev up. Thought it was the prop (maybe spun) but that doesnt make sense. Motor would still rev but boat wouldnt move. Cant be linkage because it would affect the nuetral and reverse options also right? Could fuel mixture be an issue? (anyone know proper mixture?). Am I right to assume the carb cant be the issue? If it were carb related wouldnt it prevent wot in nuetral as well as foward? Like I said it nuetral it revs up and screams, reverse revs up nice and moves just as fast as wot in foward. Foward sounds like it doesnt rev up more than half way. Does foward put more load on the carb than reverse?
2. Once the motor is shut off, regardless of how long its been run, it is still difficult to start back up. I believe this is a carb issue or maybe a poor mixture?
Just for the record I also have a 97 Merc 8hp that Im using on the same boat as comparison. This Merc is easily twice as fast as the nissan and has a much better power band. I need to know if this is normal. Should the merc 8hp be this much better than the nissan 9.8hp? Both are 2 strokes by the way.
I know side by side the merc is considerably larger motor than the nissan. Any input on comparison is appreciated. I was going to replace my merc with the nissan but it's not looking like a wise decision.
